On Sat, Nov 30, 2013 at 3:30 PM, Chris Forbes <chr...@ijw.co.nz> wrote:
> Now that all the pieces are in place, this should provide
> a nice performance boost for apps using multisample textures.
>
> Signed-off-by: Chris Forbes <chr...@ijw.co.nz>
> ---
> src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 18 +-----------------
> 1 file changed, 1 insertion(+), 17 deletions(-)
>
> diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> index 4a389b9..165cc6b 100644
> --- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> +++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> @@ -99,23 +99,7 @@ intel_compute_msaa_layout(struct brw_context *brw,
> gl_format format, GLenum targ
> assert(brw->gen == 7);
> return INTEL_MSAA_LAYOUT_UMS;
> } else {
> - /* For now, if we're going to be texturing from this surface,
> - * force UMS, so that the shader doesn't have to do different things
> - * based on whether there's a multisample control surface needing
> sampled first.
> - * We can't just blindly read the MCS surface in all cases because:
> - *
> - * From the Ivy Bridge PRM, Vol4 Part1 p77 ("MCS Enable"):
> - *
> - * If this field is disabled and the sampling engine <ld_mcs>
> message
> - * is issued on this surface, the MCS surface may be accessed.
> Software
> - * must ensure that the surface is defined to avoid GTT errors.
> - */
> - if (target == GL_TEXTURE_2D_MULTISAMPLE ||
> - target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) {
> - return INTEL_MSAA_LAYOUT_UMS;
> - } else {
> - return INTEL_MSAA_LAYOUT_CMS;
> - }
> + return INTEL_MSAA_LAYOUT_CMS;
> }
> }
> }
> --
> 1.8.4.2
>
> _______________________________________________
> mesa-dev mailing list
> mesa-dev@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/mesa-dev
I noticed this issue last week and reported on IRC:
This commit (83b83fb on mesa master) causes the
arb_sample_shading-builtin-gl-sample-id test to fail on IVB.
I haven't tested on HSW. Raised a bug to keep track of issue:
https://bugs.freedesktop.org/show_bug.cgi?id=72859
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
